IndexHelperTest.java example

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package org.apache.cassandra.io.sstable;

import java.util.ArrayList;
import java.util.List;

import static org.junit.Assert.*;

import org.junit.Test;

import org.apache.cassandra.db.marshal.AbstractType;
import org.apache.cassandra.db.marshal.IntegerType;
import static org.apache.cassandra.io.sstable.IndexHelper.IndexInfo;
import static org.apache.cassandra.utils.ByteBufferUtil.bytes;

public class IndexHelperTest
{
    @Test
    public void testIndexHelper()
    {
        List<IndexInfo> indexes = new ArrayList<IndexInfo>();
        indexes.add(new IndexInfo(bytes(0L), bytes(5L), 0, 0));
        indexes.add(new IndexInfo(bytes(10L), bytes(15L), 0, 0));
        indexes.add(new IndexInfo(bytes(20L), bytes(25L), 0, 0));

        AbstractType comp = IntegerType.instance;

        assertEquals(0, IndexHelper.indexFor(bytes(-1L), indexes, comp, false, -1));
        assertEquals(0, IndexHelper.indexFor(bytes(5L), indexes, comp, false, -1));
        assertEquals(1, IndexHelper.indexFor(bytes(12L), indexes, comp, false, -1));
        assertEquals(2, IndexHelper.indexFor(bytes(17L), indexes, comp, false, -1));
        assertEquals(3, IndexHelper.indexFor(bytes(100L), indexes, comp, false, -1));
        assertEquals(3, IndexHelper.indexFor(bytes(100L), indexes, comp, false, 0));
        assertEquals(3, IndexHelper.indexFor(bytes(100L), indexes, comp, false, 1));
        assertEquals(3, IndexHelper.indexFor(bytes(100L), indexes, comp, false, 2));
        assertEquals(-1, IndexHelper.indexFor(bytes(100L), indexes, comp, false, 3));

        assertEquals(-1, IndexHelper.indexFor(bytes(-1L), indexes, comp, true, -1));
        assertEquals(0, IndexHelper.indexFor(bytes(5L), indexes, comp, true, -1));
        assertEquals(1, IndexHelper.indexFor(bytes(17L), indexes, comp, true, -1));
        assertEquals(2, IndexHelper.indexFor(bytes(100L), indexes, comp, true, -1));
        assertEquals(0, IndexHelper.indexFor(bytes(100L), indexes, comp, true, 0));
        assertEquals(1, IndexHelper.indexFor(bytes(12L), indexes, comp, true, -1));
        assertEquals(1, IndexHelper.indexFor(bytes(100L), indexes, comp, true, 1));
        assertEquals(2, IndexHelper.indexFor(bytes(100L), indexes, comp, true, 2));
        assertEquals(-1, IndexHelper.indexFor(bytes(100L), indexes, comp, true, 4));
    }
}